CA1065514A - Automatic h-register clear for prevention of erroneous convolution in digital adaptive echo canceller - Google Patents

Automatic h-register clear for prevention of erroneous convolution in digital adaptive echo canceller

Info

Publication number
CA1065514A
CA1065514A CA262,668A CA262668A CA1065514A CA 1065514 A CA1065514 A CA 1065514A CA 262668 A CA262668 A CA 262668A CA 1065514 A CA1065514 A CA 1065514A
Authority
CA
Canada
Prior art keywords
register
echo
signal
digital
value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA262,668A
Other languages
English (en)
French (fr)
Inventor
Eric R. Kauffman
Henri G. Suyderhoud
Michael Onufry (Jr.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Comsat Corp
Original Assignee
Comsat Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Comsat Corp filed Critical Comsat Corp
Priority to CA318,685A priority Critical patent/CA1066826A/en
Application granted granted Critical
Publication of CA1065514A publication Critical patent/CA1065514A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
CA262,668A 1975-10-23 1976-10-04 Automatic h-register clear for prevention of erroneous convolution in digital adaptive echo canceller Expired CA1065514A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA318,685A CA1066826A (en) 1975-10-23 1978-12-28 Automatic h-register clear for prevention of erroneous convolution in digital adaptive echo canceller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/625,354 US4021623A (en) 1975-10-23 1975-10-23 Automatic H-register clear for prevention of erroneous convolution in digital adaptive echo canceller

Publications (1)

Publication Number Publication Date
CA1065514A true CA1065514A (en) 1979-10-30

Family

ID=24505681

Family Applications (1)

Application Number Title Priority Date Filing Date
CA262,668A Expired CA1065514A (en) 1975-10-23 1976-10-04 Automatic h-register clear for prevention of erroneous convolution in digital adaptive echo canceller

Country Status (10)

Country Link
US (1) US4021623A (https=)
JP (2) JPS5252516A (https=)
AU (1) AU498405B2 (https=)
BR (1) BR7607021A (https=)
CA (1) CA1065514A (https=)
DE (1) DE2647305A1 (https=)
FR (1) FR2333388A1 (https=)
GB (1) GB1509988A (https=)
IT (1) IT1070494B (https=)
SE (1) SE406401B (https=)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56153850A (en) * 1980-04-28 1981-11-28 Kokusai Denshin Denwa Co Ltd <Kdd> Echo control system
US4412299A (en) * 1981-02-02 1983-10-25 Teltone Corporation Phase jitter detector
DE3245588A1 (de) * 1982-12-09 1984-06-14 Standard Elektrik Lorenz Ag, 7000 Stuttgart Verfahren und schaltungsanordnung zur fehlerortung bei einem digitalen fernmelde-teilnehmeranschluss
JP3068996B2 (ja) * 1993-12-21 2000-07-24 真作 森 適応フィルタ装置及びそのステップゲインの発生方法
JPH08265224A (ja) * 1995-03-22 1996-10-11 Nec Corp エコーキャンセラ
US6125179A (en) * 1995-12-13 2000-09-26 3Com Corporation Echo control device with quick response to sudden echo-path change
US10679227B2 (en) * 2015-11-06 2020-06-09 Mastercard International Incorporated Systems and methods for mapping online data to data of interest

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3836734A (en) * 1971-12-03 1974-09-17 Communications Satellite Corp Adaptive echo canceller with multi-increment gain coefficient corrections
US3789165A (en) * 1972-04-24 1974-01-29 Communications Satellite Corp Echo canceller with variable threshold
US3894200A (en) * 1973-10-10 1975-07-08 Communications Satellite Corp Adaptive echo canceller with digital center clipping

Also Published As

Publication number Publication date
JPS5252516A (en) 1977-04-27
US4021623A (en) 1977-05-03
JPS59131232A (ja) 1984-07-28
AU1864376A (en) 1978-04-20
AU498405B2 (en) 1979-03-08
SE7611711L (sv) 1977-04-24
BR7607021A (pt) 1977-09-06
FR2333388B1 (https=) 1981-08-07
SE406401B (sv) 1979-02-05
JPS602810B2 (ja) 1985-01-24
FR2333388A1 (fr) 1977-06-24
GB1509988A (en) 1978-05-10
IT1070494B (it) 1985-03-29
DE2647305A1 (de) 1977-04-28

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